see if this helps.....this is off of another site
Post-War S Series N frames:
S62,489 S67,999
..1946 - Early 1947
S68,000 S71,999
.Late 1947 Early 1948
S72,000 S72,499
.Late 1948 - Early 1949
S72,500 S74,999
.Late 1949 Early 1950
S75,000 S80,499
.Late 1950 Early 1951
S80,500 S85,999
.Late 1952 Early 1952
S86,000 S94,999
.
Late 1952 Early 1953
S95,000 S102,999
.Late 1953 Early 1954
S103,000 S139,999
Late 1954 Early 1955*
S140,000 S149,999
.Late 1955 Early 1956
S150,000 S175,999
Late 1956 Early 1957
S176,000 S181,999
Late 1957 Early 1958
S182,000 S194,499
Late 1958 Early 1959
S194,500 S206.999
Late 1959 Early 1960
S207,000 S219,999
Late 1960 Early 1961
S220,000 S227,999
Late 1961 Early 1962
S228,000 S231,999
Late 1962 Early 1963
S232,000 S235.999
Late 1963 Early 1964
S236,000 S257,999
Late 1964 Early 1965
S258,000 S261,999
Late 1965 Early 1966
S262,000 S289,999
Late 1966 Early 1967
S290,000 S304,999
Late 1967 Early 1968
S305,000 S329,999
Late 1968 Early 1969
S330,000 S333,454
Late 1969 Early 1970
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